I actually thought the fact it took about 50 attempts from Ajay before Sam finally came clean showed him up to be incredibly sneaky and immature to be honest, if he truly felt bad about it it wouldn't have taken him so long.
Also sad to see Cosi go, aside from being ultra competitive and getting a lot of air time (not his fault!) I thought he came across as a really nice guy, who loved his family and worked his arse off in their to mantain his position as biggest loser throughout. He handled finding out about Sams little trick very well, I was expecting fistycuffs! He deserved to be in the finale and I hope to see him return.